Messages in this thread | | | From | Grant Likely <> | Date | Sun, 12 Feb 2012 17:04:20 -0700 | Subject | Re: [PATCH V3 1/1] dt: add of_get_child_count helper function |
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On Sat, Feb 11, 2012 at 10:22 AM, Dong Aisheng <dong.aisheng@linaro.org> wrote: > Currently most code to get child count in kernel are almost same, > add a helper to implement this function for dt to use. > > Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org> > Cc: Grant Likely <grant.likely@secretlab.ca> > Cc: Rob Herring <rob.herring@calxeda.com> > > --- > Hi Rob, > > Since my imx pinctrl driver series still depends on the pinctrl core dt > binding patch which is still not in mainline, i'd like this pure dt patch > go separately first in case others want to use. > > changes v2->v3: > Addressed some people's comments: > * do not use assignment as expression > * return 0 for non-dt case > > Changes v1->v2: > * change the name from of_get_child_number to of_get_child_count > --- > include/linux/of.h | 16 ++++++++++++++++ > 1 files changed, 16 insertions(+), 0 deletions(-) > > diff --git a/include/linux/of.h b/include/linux/of.h > index a75a831..ae242ef 100644 > --- a/include/linux/of.h > +++ b/include/linux/of.h > @@ -195,6 +195,17 @@ extern struct device_node *of_get_next_child(const struct device_node *node, > for (child = of_get_next_child(parent, NULL); child != NULL; \ > child = of_get_next_child(parent, child)) > > +static inline int of_get_child_count(const struct device_node *np) > +{ > + struct device_node *child = NULL; > + int num = 0; > + > + while ((child = of_get_next_child(np, child)) != NULL) > + num++;
Use for_each_child_of_node()
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